Both products are some of the purest, highest quality protein powders available on them market today. EnergyFirst ProEnergy contains whey protein isolate, which is the purest and most absorbable form of whey protein in existence, containing 90% pure protein. It is lactose, fat, and cholesterol free. EnergyFirst Verree Vanilla is our original formulation, containing 100% pure whey protein concentrate, which was the purest whey protein available when we first formulated it in 1997. It is a close second in purity to whey protein isolate, and is 80% pure protein, but it does contain small amounts of lactose, fat, and cholesterol. Both products are cross-flow-micro-filtered, which is the cleanest processing technique, using no chemicals and no heat (as opposed to ion exchange processing, which uses both heat and chemicals), thereby producing whey protein that is highly undenatured, with almost 100% of all the whey sub-fractions intact, including powerful immune booster lactoferrin. Both products are 100% natural and are very low in carbohydrates. Both products are sweetened with Stevia Leaf extract (a natural herbal sweetener that is 400 times sweeter than sugar) and Trutina Dulcem T (extract of kiwi fruit which is 15 times sweeter than sugar), which do not affect blood sugar and are safe (and recommended) for diabetics. If you have lactose intolerance, and you are using whey protein powder every day, we recommend using EnergyFirst ProEnergy.